/Engine/Source/Editor/PlacementMode/Public/PlacementModeModule.h
Add the specified assets to the recently placed items list
virtual void AddToRecentlyPlaced ( const [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & PlacedObjects, [UActorFactory](API\Editor\UnrealEd\ActorFactories\UActorFactory) * FactoryUsed )